Safety type hand crank

• Main Authors: LIU XINQIN, ZHANG CHUANYONG
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2012
• Subjects: BLASTING; BRAKES; CLUTCHES; COMBUSTION ENGINES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model discloses a safety type hand crank, which comprises a gland (8), a casing (10) and a positioning sleeve (25), wherein the gland (8), the casing (10) and the positioning sleeve (25) are connected by screws (9) to form a whole body. The safety type hand crank is characterized in that the left end of the positioning sleeve (25) is in positioned connection with the gland (8); the right end of the positioning sleeve (25) is in positioned connection with the casing (10); a shaft sleeve (27), a bearing (4) and an input shaft (3) are arranged in the gland (8); the left end of the input shaft (3) is connected with a handle part (1) through a pin roll (2); the right end of the input shaft (3) is connected with one end of a first clutch; the other end of the first clutch is connected with one end of a central shaft (15) supported in the positioning sleeve (25); the other end of the central shaft (15) is arranged on an output shaft (18); a second friction clutch is arranged on the central shaft (15); an